In the speedbump view, use hasOverlappingRenderings instead of layers

Bug: 15181880
Change-Id: I49b0dbe1cd0ff9f7804dc68502b73fcfd87c7389

packages/SystemUI/res/layout/status_bar_notification_speed_bump.xml

@@ -28,7 +28,7 @@
             android:layout_height="@dimen/speed_bump_height_collapsed"
             android:layout_gravity="top"
             android:orientation="horizontal">
-        <View
+        <com.android.systemui.statusbar.AlphaOptimizedView
             android:id="@+id/speedbump_line_left"
             android:layout_width="0dp"
             android:layout_height="1dp"
@@ -42,7 +42,7 @@
                 android:layout_marginEnd="8dp"
                 android:layout_height="match_parent"
                 android:layout_weight="0"/>
-        <View
+        <com.android.systemui.statusbar.AlphaOptimizedView
             android:id="@+id/speedbump_line_right"
             android:layout_width="0dp"
             android:layout_height="1dp"

packages/SystemUI/src/com/android/systemui/statusbar/AlphaOptimizedView.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.systemui.statusbar;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * A View which does not have overlapping renderings commands and therefore does not need a
+ * layer when alpha is changed.
+ */
+public class AlphaOptimizedView extends View
+{
+    public AlphaOptimizedView(Context context) {
+        super(context);
+    }
+
+    public AlphaOptimizedView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public AlphaOptimizedView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public AlphaOptimizedView(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+}

packages/SystemUI/src/com/android/systemui/statusbar/SpeedBumpDotView.java

@@ -41,6 +41,11 @@ public class SpeedBumpDotView extends View {
         canvas.drawCircle(radius, radius, radius, mPaint);
     }
 
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+
     public void setColor(int color) {
         mPaint.setColor(color);
     }

packages/SystemUI/src/com/android/systemui/statusbar/SpeedBumpDotsState.java

@@ -70,23 +70,12 @@ public class SpeedBumpDotsState {
         for (int i = 0; i < childCount; i++) {
             View child = mHostView.getChildAt(i);
             ViewState viewState = mStateMap.get(child);
-            float translationX = child.getTranslationX();
-            float translationY = child.getTranslationY();
-            float scale = child.getScaleX();
-            float alpha = child.getAlpha();
-            if (translationX != viewState.xTranslation) {
-                child.setTranslationX(viewState.xTranslation);
-            }
-            if (translationY != viewState.yTranslation) {
-                child.setTranslationY(viewState.yTranslation);
-            }
-            if (scale != viewState.scale) {
-                child.setScaleX(viewState.scale);
-                child.setScaleY(viewState.scale);
-            }
-            if (alpha != viewState.alpha) {
-                child.setAlpha(viewState.alpha);
-            }
+
+            child.setTranslationX(viewState.xTranslation);
+            child.setTranslationY(viewState.yTranslation);
+            child.setScaleX(viewState.scale);
+            child.setScaleY(viewState.scale);
+            child.setAlpha(viewState.alpha);
         }
     }
 
@@ -115,7 +104,7 @@ public class SpeedBumpDotsState {
             ViewState viewState = mStateMap.get(child);
             child.animate().setInterpolator(mFastOutSlowInInterpolator)
                     .setStartDelay(startDelay)
-                    .alpha(viewState.alpha).withLayer()
+                    .alpha(viewState.alpha)
                     .translationX(viewState.xTranslation)
                     .translationY(viewState.yTranslation)
                     .scaleX(viewState.scale).scaleY(viewState.scale);

packages/SystemUI/src/com/android/systemui/statusbar/SpeedBumpView.java

@@ -37,8 +37,8 @@ public class SpeedBumpView extends ExpandableView implements View.OnClickListene
     private final int mDotsHeight;
     private final int mTextPaddingInset;
     private SpeedBumpDotsLayout mDots;
-    private View mLineLeft;
-    private View mLineRight;
+    private AlphaOptimizedView mLineLeft;
+    private AlphaOptimizedView mLineRight;
     private boolean mIsExpanded;
     private boolean mDividerVisible = true;
     private ValueAnimator mCurrentAnimator;
@@ -89,8 +89,8 @@ public class SpeedBumpView extends ExpandableView implements View.OnClickListene
     protected void onFinishInflate() {
         super.onFinishInflate();
         mDots = (SpeedBumpDotsLayout) findViewById(R.id.speed_bump_dots_layout);
-        mLineLeft = findViewById(R.id.speedbump_line_left);
-        mLineRight = findViewById(R.id.speedbump_line_right);
+        mLineLeft = (AlphaOptimizedView) findViewById(R.id.speedbump_line_left);
+        mLineRight = (AlphaOptimizedView) findViewById(R.id.speedbump_line_right);
         mExplanationText = (TextView) findViewById(R.id.speed_bump_text);
         resetExplanationText();
 
@@ -176,8 +176,7 @@ public class SpeedBumpView extends ExpandableView implements View.OnClickListene
                     .scaleX(scale)
                     .scaleY(scale)
                     .translationY(translationY)
-                    .setListener(needsHideListener ? mHideExplanationListener : null)
-                    .withLayer();
+                    .setListener(needsHideListener ? mHideExplanationListener : null);
             mExplanationTextVisible = visible;
         }
     }
@@ -211,7 +210,6 @@ public class SpeedBumpView extends ExpandableView implements View.OnClickListene
             float endTranslationXRight = nowVisible ? 0.0f : mCenterX - mLineRight.getLeft();
             mLineLeft.animate()
                     .alpha(endValue)
-                    .withLayer()
                     .scaleX(endValue)
                     .scaleY(endValue)
                     .translationX(endTranslationXLeft)
@@ -219,7 +217,6 @@ public class SpeedBumpView extends ExpandableView implements View.OnClickListene
                     .withEndAction(onFinishedRunnable);
             mLineRight.animate()
                     .alpha(endValue)
-                    .withLayer()
                     .scaleX(endValue)
                     .scaleY(endValue)
                     .translationX(endTranslationXRight)